DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
The heart pumps oxygenated blood to the body and deoxygenated blood to the lungs. In the human heart there is one atrium and one ventricle for each circulation, and with both a systemic and a pulmonary circulation there are four chambers in total: left atrium, left ventricle, right atrium and right ventricle.
Systemic Circulation: The blood from the lungs comes back to the left side of the heart through the left atrium. It. then moves into the left ventricle and the ventricle pushes it out through the aorta (biggest artery) and into the rest. of the arteries. The arteries carry oxygenated blood to all of the bodyâs tissues.